March 14th, 2010 by Steven DiMartino
4:10 PM
Another round of rainfall is expected tonight with this storm, however the worst conditions are over.
The storm developed initially as a frontal boundary off the New Jersey coast. As a strong upper low started to drive towards the Mississippi Valley, the low and eventually mid level winds began to veer to the southeast off the Atlantic. As strong lifting started to develop off the Mid Atlantic and Southeast coast, a coastal low developed off the South Carolina coast and tracked towards the Ohio Valley Thursday evening through Friday evening, which produced periods of moderate to heavy rain. High pressure over Quebec helped enhance the pressure gradient leading to increasing easterly wind ranging from 15 to 30 mph with gusts to 40 mph, however the worst was yet to come.
The 500 MB low finally entered the Tennessee Valley early on Saturday morning, which spawned a second coastal low off the Delaware Coast. This coastal low also back tracked initially towards central Virginia while intensifying to 994 MB. This low pressure system was under the influence of tramendous mid and upper level lifting due to the intense 500 MB low. The 850 MB low level jet stream intensified due to this lifting and drove an intense area of heavy rainfall. The heavy rainfall was able to draw the wind gusts from this 850 MB low level jet stream to create wind gusts of 40 MPH to as high as 75 MPH.
This morning, the low pressure system became vertically stacked, which means the 500 MB, 700 MB, 850 MB, and surface low are all directly over each other. This has caused the storm to weaken rapidly and is now moving east into the Atlantic. Another round of light to moderate rain is expected as the low pressure system exits, but not with the same intensify in terms of rainfall rates nor wind gusts.
The following are official reports from the National Weather Service of this storm.
NEW JERSEY
…ATLANTIC COUNTY…
HAMMONTON 4.23 800 AM 3/14
BUENA VISTA 3.67 800 AM 3/14
ATLANTIC CITY 2.96 800 AM 3/14 INTERNATIONAL AIRPORT
LINWOOD 2.90 800 AM 3/14
…BURLINGTON COUNTY…
WRIGHTST/MCGUIRE 3.17 800 AM 3/14
BURLINGTON 2.94 800 AM 3/14
PEMBERTON 2.93 800 AM 3/14
MEDFORD 2.92 800 AM 3/14
MOORESTOWN 2.81 800 AM 3/14
MOUNT HOLLY NWS 2.17 700 AM 3/14
MANSFIELD SQUARE 2.09 800 AM 3/14
…CAMDEN COUNTY…
WINSLOW 3.66 800 AM 3/14
BERLIN 2.80 800 AM 3/14
…CAPE MAY COUNTY…
WOODBINE 3.61 800 AM 3/14
SEA ISLE CITY 2.81 800 AM 3/14
WILDWOOD 2.62 800 AM 3/14
WILDWOOD CREST 2.62 800 AM 3/14
STONE HARBOR 2.60 800 AM 3/14
CAPE MAY HARBOR 2.55 700 AM 3/14
GREEN CREEK 2.55 700 AM 3/14
SEAVILLE 2.20 700 AM 3/14
…CUMBERLAND COUNTY…
VINELAND 3.70 700 AM 3/14
MILLVILLE 2.90 800 AM 3/14
UPPER DEERFIELD 2.50 800 AM 3/14
…GLOUCESTER COUNTY…
FRANKLINVILLE 3.73 700 AM 3/14
…HUNTERDON COUNTY…
READINGTON 4.68 800 AM 3/14
LEBANON 4.04 800 AM 3/14
FLEMINGTON 3.95 800 AM 3/14
CALIFON 3.29 800 AM 3/14
BETHLEHEM 3.14 800 AM 3/14
HOLLAND 2.47 800 AM 3/14
…MERCER COUNTY…
LAWRENCE 3.78 800 AM 3/14
PENNINGTON 3.33 800 AM 3/14
HAMILTON SQUARE 3.16 800 AM 3/14
EWING 3.10 800 AM 3/14
…MIDDLESEX COUNTY…
SOUTH AMBOY 6.08 900 AM 3/14
SOUTH PLAINFIELD 5.12 800 AM 3/14
PLAINSBORO 4.11 830 AM 3/14
CRANBURY 3.71 800 AM 3/14
…MONMOUTH COUNTY…
BELMAR/FARMDALE 2.31 800 AM 3/14
…MORRIS COUNTY…
MONROE 4.85 800 AM 3/14
RANDOLPH 4.79 800 AM 3/14
KINNELON 4.75 800 AM 3/14
CHESTER 4.56 800 AM 3/14
MENDHAM 4.56 800 AM 3/14
ROXBURY 4.29 800 AM 3/14
WASHINGTON CORNER 3.72 800 AM 3/14
PARSIPPANY 3.59 800 AM 3/14
ROCKAWAY 3.46 800 AM 3/14
MOUNT OLIVE 3.42 800 AM 3/14
BOONTON 3.31 800 AM 3/14
DENVILLE 3.22 800 AM 3/14
…OCEAN COUNTY…
SOUTH TOMS RIVER 3.44 800 AM 3/14
BERKELEY SHORES 3.05 800 AM 3/14
TOMS RIVER 2.40 800 AM 3/14
POINT PLEASANT BEACH 2.31 800 AM 3/14
…SOMERSET COUNTY…
BRIDGEWATER 4.72 800 AM 3/14
SOMERVILLE 4.39 800 AM 3/14
HILLSBOROUGH 4.36 800 AM 3/14
MONTGOMERY 3.98 800 AM 3/14
…SUSSEX COUNTY…
HARDYSTON 4.65 800 AM 3/14
ANDOVER 3.32 800 AM 3/14
VERNON 3.03 800 AM 3/14
SUSSEX 2.61 800 AM 3/14
WANTAGE 2.57 800 AM 3/14
SPARTA 2.10 800 AM 3/14
…WARREN COUNTY…
STEWARTSVILLE 2.73 930 AM 3/14
BLAIRSTOWN 2.30 800 AM 3/14
PHILLIPSBURG 2.00 1000 AM 3/14
KNOWLTON 1.89 800 AM 3/14
PENNSYLVANIA
…BERKS COUNTY…
BIRDSBORO 3.09 800 AM 3/14
WEST LAWN 2.13 800 AM 3/14
MOHNTON 1.74 800 AM 3/14
KUTZTOWN 1.52 800 AM 3/14
READING 1.20 800 AM 3/14
FLEETWOOD 1.19 800 AM 3/14
…BUCKS COUNTY…
BENSALEM 2.88 800 AM 3/14
…CARBON COUNTY…
BOWMANSTOWN 1.75 800 AM 3/14
LEHIGHTON 1.42 800 AM 3/14
JIM THORPE 1.41 800 AM 3/14
PALMERTON 1.18 800 AM 3/14
…CHESTER COUNTY…
UNIONVILLE 2.82 800 AM 3/14
NOTTINGHAM 2.10 800 AM 3/14
KENNETT SQUARE 2.00 800 AM 3/14
…LEHIGH COUNTY…
ALLENTOWN 1.77 800 AM 3/14 INTERNATIONAL AIRPORT
SLATINGTON 1.58 430 AM 3/14
…MONROE COUNTY…
MT. POCONO 1.42 800 AM 3/14
…MONTGOMERY COUNTY…
HATFIELD 3.46 800 AM 3/14
NORTH WALES 3.00 800 AM 3/14
ROCKLEDGE 2.90 800 AM 3/14
AMBLER 2.79 800 AM 3/14
SOUDERTON 2.72 800 AM 3/14
WILLOW GROVE NAS 2.43 800 AM 3/14
HARLEYSVILLE 2.30 800 AM 3/14
GILBERTSVILLE 1.85 800 AM 3/14
KULPSVILLE 1.85 800 AM 3/14
BECHTELSVILLE 1.66 830 AM 3/14
…NORTHAMPTON COUNTY…
GLENDON 1.93 800 AM 3/14
…PHILADELPHIA COUNTY…
PHILADELPHIA 3.11 800 AM 3/14 INTERNATIONAL AIRPORT
PHILADELPHIA/NE 2.30 800 AM 3/14
CONNECTICUT
…FAIRFIELD COUNTY…
CANOE BROOK LAKE 3.80 700 PM 3/13 MESONET
DANBURY 2.66 1100 PM 3/13 PUBLIC
DANBURY 2.53 1011 PM 3/13 ASOS
…NEW HAVEN COUNTY…
BRANFORD 2.80 1230 AM 3/14 PUBLIC
NEW HAVEN/TWEED 2.61 1017 PM 3/13 ASOS
MERIDEN 1.80 700 PM 3/13 SKYWARN SPOTTER
MERIDEN 1.68 1000 PM 3/13 ASOS
…NEW LONDON COUNTY…
OLD LYME 3.04 1035 PM 3/13 PUBLIC
GROTON/NEW LONDON 1.64 1005 PM 3/13 ASOS
COLCHESTER 1.62 700 PM 3/13 MESONET
NEW JERSEY
…BERGEN COUNTY…
LYNDHURST 3.44 100 AM 3/14 PUBLIC
NORTH ARLINGTON 3.43 645 PM 3/13 SKYWARN SPOTTER
RAMSEY 2.93 900 PM 3/13 SKYWARN SPOTTER
TETERBORO 2.15 1000 PM 3/13 ASOS
RIDGEWOOD 2.00 700 PM 3/13 SKYWARN SPOTTER
FRANKLIN LAKES 1.92 406 PM 3/13 MESONET
TENAFLY 1.76 700 PM 3/13 PUBLIC
…ESSEX COUNTY…
NEWARK 4.21 1012 PM 3/13 ASOS
CALDWELL 2.84 1008 PM 3/13 ASOS
…HUDSON COUNTY…
NORTH BERGEN 5.16 1045 PM 3/13 MESONET
HARRISON 4.59 1045 PM 3/13 MESONET
JERSEY CITY 3.97 1045 PM 3/13 MESONET
HOBOKEN 3.56 1045 PM 3/13 MESONET
KEARNY 2.04 645 PM 3/13 SKYWARN SPOTTER
SECAUCUS 2.02 645 PM 3/13 SKYWARN SPOTTER
…PASSAIC COUNTY…
HAWTHORNE 2.10 1033 PM 3/13 PUBLIC
…UNION COUNTY…
ELIZABETH 6.62 1100 PM 3/13 SKYWARN SPOTTER
ROSELLE PARK 3.51 600 PM 3/13 SKYWARN SPOTTER
NEW YORK
…KINGS COUNTY…
BROOKLYN 3.61 810 PM 3/13 COOP
…NASSAU COUNTY…
EAST MEADOW 3.93 1201 AM 3/14 SKYWARN SPOTTER
MUTTONTOWN 3.29 1045 PM 3/13 SKYWARN SPOTTER
MASSAPEQUA 2.25 930 PM 3/13 SKYWARN SPOTTER
MILL NECK 1.09 800 AM 3/13 COCORAHS
…NEW YORK COUNTY…
NYC/CENTRAL PARK 3.64 1010 PM 3/13 ASOS
…ORANGE COUNTY…
HARRIMAN 2.90 730 PM 3/13 PUBLIC
…QUEENS COUNTY…
SOUTH OZONE PARK 3.27 1159 PM 3/13 PUBLIC
NYC/LA GUARDIA 2.61 1000 PM 3/13 ASOS
NYC/JFK ARPT 2.06 1000 PM 3/13 ASOS
…SUFFOLK COUNTY…
STONY BROOK 3.16 1200 AM 3/13 SKYWARN SPOTTER
MOUNT SINAI 2.93 820 PM 3/13 NWS EMPLOYEE
ORIENT 2.68 1020 PM 3/13 PUBLI
ORIENT 2.68 1055 PM 3/13 PUBLIC
MONTAUK 2.50 1000 PM 3/13 ASOS
SHIRLEY 2.45 1000 PM 3/13 ASOS
ISLIP 2.38 1000 PM 3/13 ASOS
UPTON 2.37 700 PM 3/13 NWS OFFICE
ISLIP 2.33 1220 AM 3/14 SKYWARN SPOTTER
NORTHPORT 1.97 707 PM 3/13 MESONET
WESTHAMPTON BEACH 1.93 1015 PM 3/13 ASOS
FARMINGDALE 1.57 1013 PM 3/13 ASOS
BAITING HOLLOW 1.52 1055 AM 3/13 PUBLIC
…WESTCHESTER COUNTY…
WHITE PLAINS 1.32 830 PM 3/13 PUBLIC
***********************PEAK WIND GUST***********************
LOCATION PEAK WIND TIME/DATE COMMENTS
GUST OF
(MPH) MEASUREMENT
CONNECTICUT
…FAIRFIELD COUNTY…
DANBURY 40 654 PM 3/13 ASOS
…NEW HAVEN COUNTY…
NEW HAVEN/TWEED 46 505 PM 3/13 ASOS
MERIDEN 36 752 PM 3/13 ASOS
…NEW LONDON COUNTY…
GROTON/NEW LONDON 59 812 PM 3/13 ASOS
NEW JERSEY
…BERGEN COUNTY…
FORT LEE 66 634 PM 3/13 SKYWARN SPOTTER
TETERBORO 59 859 PM 3/13 ASOS
BERGENFIELD 52 605 PM 3/13 SKYWARN SPOTTER
…ESSEX COUNTY…
CALDWELL 55 605 PM 3/13 ASOS
NEWARK 45 1002 AM 3/13 ASOS
NEWARK 45 844 PM 3/13 ASOS
…HUDSON COUNTY…
JERSEY CITY 50 621 AM 3/13 MESONET
HARRISON 45 730 AM 3/13 NWS COOP
BAYONNE 41 525 AM 3/13 MESONET
KEARNY 41 339 PM 3/13 SKYWARN SPOTTER
KEARNY 41 124 PM 3/13 PUBLIC
NEW YORK
…BRONX COUNTY…
PELHAM BAY PARK 55 515 PM 3/13 PUBLIC
…NASSAU COUNTY…
JONES BEACH STATE 67 350 PM 3/13 COAST GUARD
BAYVILLE 63 435 PM 3/13 MESONET
JONES BEACH ISLAND 63 240 PM 3/13 MESONET
…NEW YORK COUNTY…
NYC/CENTRAL PARK 53 345 PM 3/13 ASOS
…ORANGE COUNTY…
MONTGOMERY 39 713 PM 3/13 ASOS
…QUEENS COUNTY…
NYC/JFK ARPT 75 833 PM 3/13 ASOS
BREEZY POINT 67 330 PM 3/13 MESONET
NYC/LA GUARDIA 48 1001 AM 3/13 ASOS
NYC/LA GUARDIA 48 1001 PM 3/13 ASOS
…SUFFOLK COUNTY…
BLUE POINT 67 302 PM 3/13 MESONET
FIRE ISLAND 67 700 PM 3/13 COAST GUARD
AMITY HARBOR 66 621 PM 3/13 MESONET
FARMINGDALE 60 636 PM 3/13 ASOS
SHIRLEY 56 340 PM 3/13 ASOS
SHIRLEY 56 539 PM 3/13 ASOS
WESTHAMPTON BEACH 55 502 PM 3/13 ASOS
ISLIP 54 346 PM 3/13 ASOS
EAST SETAUKET 53 445 PM 3/13 PUBLIC
SOUTHAMPTON 53 625 PM 3/13 MESONET
LINDENHURST 48 1100 AM 3/13 SKYWARN SPOTTER
FISHERS ISLAND 47 1105 AM 3/13 MESONET
NAPEAGUE 43 1038 AM 3/13 MESONET
GILGO BEACH 40 245 AM 3/13 MESONET
…WESTCHESTER COUNTY…
WHITE PLAINS 62 629 PM 3/13 ASOS
LARCHMONT 46 919 AM 3/13 HARBOR MESONET
-- Weather When Posted --
- Temperature: 46°F;
- Humidity: 93%;
- Heat Index: 46°F;
- Wind Chill: 40°F;
- Pressure: 29.53 in.;
March 14th, 2010 by Steven DiMartino
11:20 AM
The area of low pressure responsible for widespread flooding, coastal flooding, and wind damage is finally starting to weaken over the central Mid Atlantic this morning.
The surface low and upper level structure of the storm have become vertically stacked. What this means is the surface, 850 MB, 700 MB, and 500 MB low pressure systems are all on top of each other. What this causes is a kind of joking off of the rising motion of the atmosphere, thus the surface low and other features begin to weaken as the strengthening and maintaining processes of the low pressure system comes to an end.
The result of this situation is that showers and the isolated yet
strong thunderstorms associated with this storm will continue to weaken over the next 24 hours. The low pressure system will slowly exit to the east-northeast into the New England coastal waters and eventually into the north Atlantic by Monday evening. In the meantime, the threat of showers and thunderstorms will continue. Any additional rainfall will only enhance the current flash flooding that has developed over many of the rivers, streams, and urban locations throughout the Philadelphia and New York City metropolitan area.
The good news is that winds that have been from the east and northeast the past three days will now shift to the northwest, which will drive the coastal waters that have flooded by bays and roadways along the coast back into the Atlantic.
Once this storm exits on Monday morning, gradual improving conditions will take hold on Monday afternoon as high pressure gains control of the region. High pressure will remain in control through the rest of the week and into next weekend with tranquil weather conditions and steadily modifying temperatures. High temperatures on Friday and Saturday in fact could be in the lower to mid 60’s over many locations just away from the coast, especially over the Delaware River Valley.
A strong Polar cold front will approach on Sunday into Monday with a return of widespread heavy rain and thunderstorms. Although this cold front is not expected to produce nearly the amount of rainfall that this storm has produced in the large scale, any additional rainfall will lead to the threat of flash flooding.
-- Weather When Posted --
- Temperature: 42°F;
- Humidity: 93%;
- Heat Index: 42°F;
- Wind Chill: 38°F;
- Pressure: 29.53 in.;